GB
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E. Relay module Ex-RM1m
E. Relay module Ex-RM1m
1. Proper use
For automatic mode (preselected volume), the relay module is required alongside the basic flow meter and operating
unit modules. The relay module is controlled by the evaluating electronics of the operating unit and switches the
external electrical appliances such as pump motor and solenoid valve. The electrical connection between the
operating unit and relay module is effected by means of a 10-core ribbon cable.
The relay module Ex-RM1m includes a power supply for the operating unit. The batteries only then have a buffer
function in the event of a power failure.
The relay module Ex-RM1m is supplied in two versions.
• The basic version of the Ex-RM1m B 230 V is without fuses, cable glands or cabling for customer-specific
applications. Particular attention shall be paid in the following chapters to the requirements on components
not included in the scope of supply.
• The full version Ex-RM1m K 230 V includes cable glands, 5 m power supply cable with Ex-plug, fusing elements
and Ex-flange boxes for pump and valve.
The relay module Ex-RM1m consists of three housing parts. The upper section houses the potted electronics.
The lower section is designed as the connection compartment in the method of explosion protection „e“ for
greater safety. The connections are made here for the power supply, pump and the solenoid valve. The lower
housing connection constitutes an intermediate plate so that it can be mounted to the lower body of the flow
meter or to any permanent base (e.g. wall, mounting plate). The upper connection of the relay module forms part
of a further module from the system.
1.1 Technical Data
Danger!
Fire and explosion hazard due to electric current.
Combustion hazard. Blast wave: Flying parts can kill you.
Compliance with the following electrical characteristics is required.
Type Ex-RM1m B 230 V Ex-RM1m K 230 V
Voltage 220 - 240 V, 50 – 60 Hz
Input supply
terminals 1+2 max. 8 A, cosj > 0.7 max. 1760-1920 W
Switching outputs 2 switching outputs (potentially bound)
Output 1 (Pump): max. 4 A fuse on construction side, 4 A fuse, cosj > 0,7
terminals 3+5 cosj > 0.7, max. 880-960 W max. 880-960 W
Output 2 (Valve) max. 4 A fuse on construction side, 0.5 A fuse
terminals 4+5 cosj > 0.7, max. 880-960 W max. 110–120 W
Type of protection IP 54
Explosion protection class II 2G EEx me[ib] IIC T4
Connections terminal block, no screw
Electronics completely potted
Accessories Basic version without fuses, Full version with fuses,
cable glands and cables. cable glands, 5 m mains connecting
For customer specific applications. cable with Ex-plug, Ex-flange
boxes for pump and valve
Weight 1000 g 3000 g
Order No. 0212-040 0212-050
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